What is the principle of an electromagnet? Explain Lenz's law (provide diagrams). Define and explain the formula of work. What is ohm's law? Explain in simple words. What measures Galvanometer? Explain the phenomenon of series resonance in an electrical circuit. ...
Here's a little animation to summarize things and hopefully make it all clear: Two pairs of electromagnet coils, shown here in red and blue, are energized in turn by an AC supply (not shown, but coming in to the leads on the right). The two red coils are wired in series and energiz...
Cribbing: The flat surface or mat built under a crane to support it on rough ground.Lifting device: It could be a simple hook, a clamshell bucket, an electromagnet, a grabbing claw, or a pronged attachment called a spreader for lifting standard-sized shipping containers at their corners....
You are asked to make a small space free of field. Describe what you propose to do to an oscillating magnetic field (e.g. 1 kHz). Explain the effect that shields the field. Why is soft iron used as the core of the electromagnet in an electric bell?
When the brake is applied, the electromagnet switches on and induces eddy currents in the disc, which create opposing magnetic fields and stop it rotating. Unlike in the motorcycle brake, there is no contact at all between the electromagnet and the brake disc: there's an air gap of a few...
Explain why a soft-iron core increases the strength of an electromagnet. Explain how and why the ferromagnetic domains formed. Draw a typical B-H loop and describe the different magnetization processes that lead to the formation of the...
How an e-bike gave a cyclist a new lease of life. Why I’m proud to ride an e-bike by Philippa Perry, The Guardian, August 27, 2017. A typical member of the "e-bike target audience" puts power-assisted cycles to the test. The GeoOrbital Wheel Lets You Make Your Bike Electric in...
Mass to Weight Conversion | Calculation & Examples from Chapter 5/ Lesson 3 324K Learn how to calculate weight and mass, convert mass to weight, and how mass from weight. Understand what the weight and mass of an object are. Related to this Question ...
Coil: This becomes an electromagnet whenelectricityflows through it. Transparent plastic cone: This makes the sound when it moves. Sponsored links How bigger headphones work As you might expect there's nothing radically different inside bigger headphones: they're just a scaled-up version of what ...
Here's how he solved the problem of storing and playing back sounds.Photo: How do you make an alien die of laughter? In the mid-1970s, when LP records were still considered the height of musical technology, the Voyager spacecraft blasted into space carrying gold-colored LP records ...